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Process of blocking end of allylol random polyether epoxy ethane

A technology of ethylene oxide capping and random polyether, which is applied in the field of allyl alcohol random polyether ethylene oxide capping. Large and other problems, to achieve the effect of increasing the molecular weight and increasing the capping rate of ethylene oxide

Active Publication Date: 2010-08-04
ZHEJIANG HUANGMA TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Another problem is that the molecular weight is not large, and it is difficult to reach more than 2200
And use multimetal cyanide (MMC) containing Co, Zn, Pb and other metal ions as catalysts to prepare allyl alcohol atactic polyether, although the molecular weight can be enlarged and the double bond conversion rate can also be improved, but a problem is encountered Just can't achieve high ethylene oxide capping rate

Method used

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  • Process of blocking end of allylol random polyether epoxy ethane

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preparation example Construction

[0008] The preparation of allyl alcohol random polyether and the preparation of the reaction kettle: first use CH 3 Strong bases such as ONa, KOH, and NaOH are used as catalysts to synthesize allyl alcohol oligomers, and after post-treatment (adding polyether adsorbent and distilled water, neutralizing and dehydrating with phosphoric acid, filtering) to remove metal ions (such as K + 、Na + ), then use multimetal cyanide (MMC) containing Co, Zn, Pb and other metal ions as a catalyst, and add a mixture of ethylene oxide and propylene oxide to react to synthesize allyl alcohol atactic polyether. Wash the 2.5L autoclave several times with distilled water until it is clean, dry the autoclave, and cool it to 30-50°C for later use.

[0009] Embodiments of the present invention take allyl alcohol polyoxypropylene ether as an example.

Embodiment 1

[0011] In the reactor, adding molecular weight is 800 allyl alcohol polyoxypropylene ether 1000g, KOH (solid) 4.5g, replacement N 2 After three times, the temperature was raised, and after the temperature was dehydrated at 80°C for 40 minutes, the temperature was controlled at 105-115°C and 165g of ethylene oxide was added to carry out the capping reaction. After adding and aging, wait for the pressure to drop to the point where it cannot be lowered, then cool down and degas to discharge the material.

Embodiment 2

[0013] In the reactor, adding molecular weight is 1000g of allyl alcohol polyoxypropylene ether of 1500, KOH (solid) 4.5g, replacement N 2 After three times, the temperature was raised, and after the temperature reached 90°C for 40 minutes of dehydration, the temperature was controlled at 80-120°C and 88 g of ethylene oxide was added to carry out the capping reaction. After adding and aging, wait for the pressure to drop to the point where it cannot be lowered, then cool down and degas to discharge the material.

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Abstract

The process of preparing random polyallyl alcohol ether with end capping epoxy ethane belongs to the field of polyether preparing technology. Random polyallyl alcohol ether with end capping epoxy ethane is prepared through epoxy ethane end capping reaction with random polyallyl alcohol ether as initial material and KOH, NaOH or CH3ONa as catalyst. The amount of the catalyst is 0.1-0.8 wt% of the ultimate product, and the number of end capping epoxy ethane is 1-10 mol. The present invention has reasonable technological process, and simultaneously raised molecular weight and epoxy ethane end capping rate of the random polyallyl alcohol ether.

Description

technical field [0001] The invention relates to a method for capping allyl alcohol random polyether ethylene oxide, which belongs to the technical field of polyether preparation. Background technique [0002] As we all know, when KOH, NaOH or sodium methoxide is used as catalyst reaction, the double bond conversion rate of allyl alcohol random polyether directly prepared is very low, especially those with large molecular weight, such as molecular weight 1400, 1600, 1800, 2000, etc. Rates are all below 91%. Another problem is that the molecular weight is not large, and it is difficult to reach more than 2200. And use multimetal cyanide (MMC) containing Co, Zn, Pb and other metal ions as catalysts to prepare allyl alcohol atactic polyether, although the molecular weight can be enlarged and the double bond conversion rate can also be improved, but a problem is encountered It is impossible to achieve a high ethylene oxide capping rate. Contents of the invention [0003] The...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G65/48
Inventor 王伟松王新荣孟照平马定连曹海洋胡华伟
Owner ZHEJIANG HUANGMA TECH